I want to buy some games off of gog (the 5 for 10 deal) but some of them i want, some of them i want to give to others. How do i go about buying the games and having all of them go as gifts?

If you choose to "Buy as gift", you will get 1 gift code with all the games in that order (5 in this case). Anyone who redeems the code will redeem all games he/she doesn't already own, while the rest of the games will remain in the code. If you have some games already, you can buy those as a gift, while redeeming the other games yourself. If you don't own any games from this promo, you can't get a code for each game unfortunately.

Correction: if the other party owns the games you want from this promo, you can have them redeem first, and you get the rest.

True, forgot this option.