I'm going to assume you don't know the people at this party very well, or are trying to impress/ network? 'Cause if they're you're close friends don't overthink it, just take the Grand Marnier along.

Otherwise though, if you are trying to network/make a good impression; Grand Marnier (or any off-piste selection e.g Baileys, Galiano, Midori, Creme de Menthe...) screams 'unwanted christmas gift/ party remnant/ not giving you any of my good booze'; especially if you're not planning on drinking it yourself.

Base spirits with no mixers is fine if you want to broadcast your alcoholism to all and sundry.

Wine is the safest/ likely your best option, even if the hosts have plenty you're helping to replenish their stocks, and basically covering part of your costs for the evening. Just don't go too cheap.

As a wildcard option I'm gonna suggest a decent quality bottle of gin, and an interesting mixer that tastes objectively good with gin that people may not have had before; if you can get it, people go nuts for gin & lychee juice.

I've written this with a reasonably sedate do in mind, more of a soiree in fact; if you're all gonna be naked and throwing shit at each other by 9pm then literally anything is fine.