Ogre Geargrabber — ruling 1

If the targeted Equipment can’t be attached to Ogre Geargrabber for some reason, you’ll still gain control of it until end of turn.

Ogre Geargrabber — ruling 2

Any ability of the targeted Equipment that triggers “whenever equipped creature attacks” won’t trigger. That’s because Ogre Geargrabber is already attacking at the time that Equipment becomes attached to it.

Ogre Geargrabber — ruling 3

The delayed triggered ability (“When you lose control of that Equipment, unattach it”) triggers the next time you lose control of the Equipment for any reason, not just when Ogre Geargrabber’s control-changing effect ends. The Equipment will become unattached from whatever creature it happens to be attached to at that time. It doesn’t matter if Ogre Geargrabber is still on the battlefield at this time.

Ogre Geargrabber — ruling 4

Ogre Geargrabber’s control-changing effect ends during the cleanup step, at the same time that damage marked on permanents is removed. If you still controlled the Equipment at that time, this causes the delayed triggered ability to trigger. It goes on the stack and players can respond (which normally doesn’t happen during the cleanup step), then, once that cleanup step ends, another one begins.

Ogre Geargrabber : règles, fonctionnement et interactions (MTG)

Ogre Geargrabber is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Whenever this creature attacks, gain control of target Equipment an opponent controls until end of turn. Attach it to this creature. When you lose control of that Equipment, unattach it.

How it works : Ogre Geargrabber

Original English text — Wizards of the Coast / Scryfall

#1January 1, 2011· Wizards of the Coast
If the targeted Equipment can’t be attached to Ogre Geargrabber for some reason, you’ll still gain control of it until end of turn.
No other card is named in this ruling.
#2January 1, 2011· Wizards of the Coast
Any ability of the targeted Equipment that triggers “whenever equipped creature attacks” won’t trigger. That’s because Ogre Geargrabber is already attacking at the time that Equipment becomes attached to it.
No other card is named in this ruling.
#3January 1, 2011· Wizards of the Coast
The delayed triggered ability (“When you lose control of that Equipment, unattach it”) triggers the next time you lose control of the Equipment for any reason, not just when Ogre Geargrabber’s control-changing effect ends. The Equipment will become unattached from whatever creature it happens to be attached to at that time. It doesn’t matter if Ogre Geargrabber is still on the battlefield at this time.
No other card is named in this ruling.
#4January 1, 2011· Wizards of the Coast
Ogre Geargrabber’s control-changing effect ends during the cleanup step, at the same time that damage marked on permanents is removed. If you still controlled the Equipment at that time, this causes the delayed triggered ability to trigger. It goes on the stack and players can respond (which normally doesn’t happen during the cleanup step), then, once that cleanup step ends, another one begins.
No other card is named in this ruling.