Today I was looking to see if there was any missing Gouf Variants, and Ja.Wiki had a few listed that has some interest (These were machine translated, and I cleaned it up as best I could):
Gouf Descent Hunter?:
Model Number: MS-07A (Sounds like a 07A variant)
Appearance: GUNDAM GAMES TACTICS, separate volume published by Hobby Japan
This Gouf is equipped with a parachute backpack aimed for airborne high altitude descent, and it was equipped with additional verniers on the legs, these were separated after descent. It was for the purposes to be out of the range of EFF anti-aircraft firearms .
These MS were deployed in the fourth MS Soldier Brigade under the command of M'Quve.
Gouf (Late Retrofit Type):
Model Number: MS-07-C1
Mobile Suit was equipped with the heat rod on the right arm, equipped with a machine gun on both arms. Originally a description mistake in "Mobile Suit Gundam" episode 23 (both machine guns and heat rods are drawn on the right arm) from former material, but later it was incorporated into the setting with "MSV". It is positioned as a preliminary stage of the heavy-duty type (MS-07C-3). Some of the materials are misprints of what is written as "late recovery".
In addition, the 07C series is positioned as for local warfare, and it is said that each specification of fixed arming is changed according to the situation to be inputted. In addition to C-3 and C-5..that C-2 and C-4 are supposed to exist in setting. Regarding C-4, it is said that a major improvement was made to the leg assisting propulsion on character setting, but details about C-2, such as appearance, what kind of specification was, etc. are unknown is there.
MS-07H-2:
This is a mysterious one, and I'm not sure if it's related to the MS-07H-2 Kai since this wikipedia article only briefly mentions it:
YMS-07A has been reborn as Type H 1-3 and YMS-07 B as Unit 4. In the shape of the cockpit hatch, the features of YMS - 07A and B type remain unchanged. Among them, Unit 3 showed relatively good performance, soon after the start of the test, it was refurbished to 07H - 2 type with a drop tank attached to the back due to fuel increase, several improvements and trial and error are repeated after that.