Basix: I know of people who've shot up 1,4-b. They say it's not pleasant.
mepat1111: yes it would be. It's not hard though, if you're seriously worried about the legal implication of being caught doing a bedroom synth of GHB from GBL, Sodium Hydroxide and Water, i suggest you're probably paranoid. Erowid provides some useful synthesis/recipe's for it.
SWIM cooked some GHB from GBL, the end substance was a white/offwhite to yellowish powder/rocks of soapy consistency. tasted quite salty. I have no doubts about a bit of lactone being left in the synth - but i doubt its really an issue. The end product was quite nice. Even ate some weighed rocks without diluting as if i were taking a pill. REALLY CLEAN in feeling.. mmm not messy like BDO or GBL at all.
If you can't tell between 1,4-b and GBL by taste there is something wrong. GBL tastes a fuckload worse, 1,4-b is easily maskable with lemon bitters or cordial. (this is given you have taken both knowingly before)