Gilder > Information
Here's Gilder's starting stats...
...when you first meet up with him after Crecent Isle (then called "Deserted Island"):
With all starting equipment:
Level 24
2860 HP, 9 MP
2 Spirit, 9 Max Spirit
138 Power, 119 Vigor, 95 Will
14 Agile, 111 Quick
253 Attack, 246 Defense, 229 Magic Def.
100% Hit, 14% Dodge
42446 EXP, 1406 to next level
Weapon: Gilder's Own (104 At, 100 Hi)
Armor: Gilder's Mail (116 De, 99 Ma)
Accessory: Gilder's Amulet (11 At, 11 De, 11 Wi, 11 Ma)
Magic: G Lv2, R Lv3, P Lv3, B Lv3, Y Lv2, S Lv1

...and when he rejoins your party after the attack on Crescent Isle:
(Is this dependent on what level he was when he left?)
Level 35
4035 HP, 13 MP
3 Spirit, 12 Max Spirit
191 Power, 163 Vigor, 117 Will
14 Agile, 156 Quick
311 Attack, 163 Defense, 163 Magic Def.
100% Hit, 14% Dodge
141160 EXP, 2075 to next level
Weapon: Daccat Custom (120 At, 100 Hi)
Armor: (None)
Accessory: (None)
Magic: G Lv3, R Lv4, P Lv4, B Lv3, Y Lv3, S Lv2