it is very possible, but it takes a VERY long time. Here is my list.

InterGov
NewPropulsion
HyperDrive
IonDrive
ImpulseDrive
UniversalTranslator
Xeno Communications
Diplomatic Relations
Advanced Diplomacy
Expert Diplomacy
Alliances
Majesty
Total Majesty
Xeno Entertainment
Xeno Business
Cultural Domination
Beam Weapon theory
Space Militarization
Galactic Warfare
Space Weapons
Mass Driver Theory
Missile Weapon Theory
StarshipDefenses
Armor Theory
Missile Defense Theory
Shield Defense Theory
Basic Logistics
Enhanced Logistics
Advanced Logistics
Expert Logistics
Ultimate Logistics
Basic Life Support
Extended Life Support
Advanced Life Support
Ultra Life Support
Xeno Factory Construction
XenoEconomics
PlanetaryImprovements
Manufacturing Centers
Xeno Farm Construction
Xeno Farm Construction II
Xeno Farm Construction III
XenoIndustrialTheory
Xeno Engineering
Xeno Bank Construction
Galactic Stock Exchanges
Industrial Sector
Soil Enhancement
Habitat Improvement
Terraforming
Basic Miniaturization
Enhanced Miniaturization
Advanced Miniaturization
Expert Miniaturization
Ultimate Miniaturization
Supreme Miniaturization
Deflectors
EnhDeflectors
ExtremeEntertainment
ZeroGSportsArena
Virtual Reality Centers
ADvDeflectors
Superior Defs
Shields
Shields II
Shields III
Subspace Rebounder
Barriers
Barriers II
Barriers III
Dynamic Shielding
Force Fields
Superior Force Fields
Invulnerability Field
Invulnerability Field II
Ultimate Invulnerability
Titanitum Armor
Duranthium
Duranthium II
Duranthium III
Tri-Strontium
Arnorian Battle Armor
Enhanced Tri-Strontium
Superior Tri-Strontium
Kanvium
Kanvium II
Kanvium III
Duralthene Armor
Adamantium Armor
Adamantium II
Ultimate Adamantium
Zero-Point Armor
Chaff
Smart Chaff
ECM
ECM II
ECM III
Point Defense
Telepathic Defense
Point Defense II
Point Defense III
PD Combo
PD Combo II
PD Combo III
Droid Sentries
Droid Sentries II
Droid Sentries III
Aereon Missile Defense
Advanced Hulls
Medium Scale Building
Large Scale Building
Master Hull Building
Massive Scale Building
Reinforced Hull Design
Hardened Hull Design
Superior Hulls
MiniBalls
MiniBalls II
Mass Drivers
Mass Drivers II
Mass Drivers III
Singularity Driver
Singularity Driver II
Singularity Driver III
Singularity Driver IV
Graviton Driver
Graviton Driver II
Graviton Driver III
Graviton Driver IV
Psyonic Shredder
Quantum Driver
Quantum Driver II
Quantum Driver III
HD Spike Driver II
HD Spike Driver III
HD Spike Driver IV
Neutrino Bullets
Laser
Laser II
Laser III
Laser IV
Laser V
Plasma Weapons
Plasma Weapons II
Plasma Weapons III
Phasors
Phasors II
Psyonic Beam
Phasors III
Phasors IV
Phasors V
Phasors VI
Phasors VII
Disruptors
Disruptors II
Disruptors III
Subspace Blaster
Subspace Annihilator
Doom Ray
Black Hole Gun
Stinger
Stinger II
Stinger III
Stinger IV
Harpoon
Harpoon II
Harpoon III
Pysonic Missile
Photonic Torpedo
Photonic Torpedo II
Photon Torpedo
Photon Torpedo II
Photon Torpedo III
Anti-Matter Torp
Anti-Matter Torp II
Anti-Matter Torp III
Quantum Torp
Quantum Torp II
Quantum Torp III
Positronic Torp
Positronic Torp II
Blackhole Eruptor
Impulse Drive Mark II
Impulse Drive Mark III
Warp Drive
Warp Drive II
Warp Drive III
Warp Drive IV
Warp Drive V
HyperWarp
HyperWarp II
HyperWarp III
Research Center
Research Academy
Neutrality Learning Center
Invention Matrix
Discovery Sphere
Deeper Knowledge
Galactic Understanding
Near Omniscience
Beyond Mortality
Technology Victory
Advanced Computing
Xeno Trade Centers
Counter Espionage
Trade
Advanced Trade
Neutral Shipping
Master Trade
StellarCartography
StarScanner
StarScanner2
Sensor2
Sensor3
Planetary Invasion
Planetary Bombardment
Space Marines
Planetary Defense
Adv. Planetary Defense
Supreme Planetary Defense
Shock Troops
Advanced Troop Mods
Tidal Disruption
XenoResearch
StarbaseMilitarization
StarbaseMobilization
StarbaseProjection
StarbaseDomination
StarbaseConquestStrategy
Starbase Fortification
Starbase Fortification Mark II
Starbase Fortification Mark III
AquaticWorldColonization
AdvancedAquaticWorldColonization
HeavyGravityColonization
AdvancedHeavyGravityColonization
ExtremeColonization
ToxicAtmosphereReductor
AdvancedToxicAtmosphereReductor
BarrenWorldColonization
AdvancedBarrenWorldColonization
RadioactiveWorldColonization
AdvancedRadioactiveWorldColonization
Plague Cure
Disease Cure
GermWarfare
SporeWeapons
Xeno Biology
Xeno Medicine
Fertility Accleration
Space Mining
Space Mining2
Space Mining3
Fusion Power Plants
Anti-Matter Power Plants
Quantum Power Plants

For some other reason, some of the tech must be researched. Titanium is an example, but most of them work....

Huhh, the tech thing doesn't show up on the forum.....

If you mean, can you make the cost of the ship components like engines and lasers free, yes you can.
But not just for yourself.

To do that you would edit GC2Types.xml, changing all the costs to 0.
And if you are going to do that, make sure you backup the original file first.