The head boots are designed to be re-used a minimum of 3 times, a set costs £30 ish so if unsure, swap them.
Good mechanics stamp the head with a centre punch if they refit them (it might be why they have 5 stars marked on the end, up to 5 uses).
Fit a GENUINE or EOM gasket.
The manual says the head should bnever be skimmed, plenty here will disagree, me included TBH but check it hasn't been skimmed already.
If you can, measure the piston projection at the front and back of all 4 pistons, then select the correct gradeof gaskt (4 available) ddon't just fit the 3 hole type, especially if the head has been done before. Get it wrong and you ruin the engine or loose compression and power/economy.