If a unit is saved with Guardian Angel does the other equipment stay attached?

Yes, if a unit is saved by Guardian Angel, all other equipment attached to that unit remains attached.

According to the official ruling on this interaction:

  • The unit never technically "died": Because Guardian Angel acts as a replacement effect, the unit is recalled to the base instead of being sent to the trash.
  • Equipment stays attached: Since the unit never leaves the board (it is simply moved from the battlefield to the base), all equipment remains attached to it.

This is confirmed by the following FAQ:

Q: When a unit with Guardian Angel dies, do equipped gears return to base or stay attached to the unit? A: Ruling: When a unit with Guardian Angel dies, all gears remain attached to the unit and return with it to the top of the deck. Nuances: The unit never technically "died" due to Guardian Angel's effect, so the normal rule of gears returning to base does not apply. All equipment stays equipped to the unit as it returns.