F20 Gear down landing rate of climb for 225T at 49 degrees gives you approx 390fpm climb at sea level.
Things get interesting if you forget to go from F30 to F20 in the Go-Around.
F30 Gear down landing rate of climb at 225T at 49 degrees gives you approx minus 190fpm at sea level!
Note, all these figures are for SINGLE ENGINE.
Performance with both engines even at 49 degrees is not an issue.
No airport will tell you you can't land with an emergency. They may 'suggest' other options but, as Captain, it's your choice.
Edited to add that these are for the 777-300 GE115. My operator doesn't have the straight 300 so willing to be corrected.
