Here 's how you get all your GFs. GF hunting wuill not be useful at Disc 4...

If you missed any GF on your way through the game, you can get them during Disc 4 at Ultimecia's Castle. After defeating Sphinxaur, choose to unlock the Draw ability. You'll then be able to draw the following GFs from the corresponding Bosses

Surprised no one posted this yet, anyway here's the answers to all the SeeD tests (passing with 100% increases your rank and thus gives you more gil per paycheck) However, your rank can still go up or down based upon your actions. You can only take tests up to Squall's current level. (Obviously this isn't a problem after Level 30)

Test # Answers
1 Y, N, Y, Y, Y, N, N, Y, N, N
2 Y, N, Y, Y, Y, N, Y, Y, N, N
3 N, N, Y, N, Y, Y, Y, N, Y, N
4 N, Y, Y, Y, N, N, Y, Y, N, N
5 N, N, N, Y, Y, N, N, Y, Y, Y
6 Y, N, Y, Y, N, N, Y, Y, N, Y
7 Y, Y, Y, Y, Y, Y, N, Y, Y, N
8 N, Y, N, N, Y, Y, N, N, Y, N
9 N, Y, N, N, N, N, N, N, Y, Y
10 Y, N, N, N, N, N, N, N, Y, N
11 Y, Y, N, Y, Y, N, Y, N, N, Y
12 N, Y, N, N, Y, N, Y, N, Y, N
13 Y, N, N, N, Y, N, N, N, N, N
14 Y, Y, Y, Y, N, Y, Y, N, Y, N
15 Y, Y, N, N, N, N, N, Y, N, Y
16 Y, N, N, Y, N, Y, N, N, Y, N
17 Y, N, N, N, Y, N, N, Y, N, N
18 Y, N, N, N, Y, N, N, N, N, N
19 Y, N, N, Y, N, N, N, N, N, Y
20 Y, Y, N, Y, N, Y, Y, Y, N, N
21 Y, Y, Y, Y, N, N, Y, Y, Y, N
22 N, N, N, Y, N, N, N, Y, Y, N
23 Y, N, N, N, N, Y, Y, Y, Y, Y
24 Y, Y, N, N, Y, Y, N, N, N, Y
25 Y, N, Y, Y, Y, N, N, Y, N, N
26 Y, Y, N, Y, N, Y, N, Y, N, N
27 N, Y, N, N, N, N, Y, N, Y, N
28 Y, N, N, Y, Y, Y, N, Y, N, N
29 N, N, N, Y, Y, N, N, N, Y, N
30 N, Y, N, N, N, N, Y, N, N, N

Download the FF8 demo from the internet. You automatically jump ahead (its a demo). Play it for a little until you beat it. (Or get to a point where you havn't got that far in the full version). Once you've gotten as far as you needed and save, move then contents of the folder 'Save' (typically under program files > FF8) to your current full version of FF8's 'Save' folder. Open the full version and you should see the demo save file in the full version. You can now play from your demo file and continue freely.