Musical key appropriate for an apartment dweller?

• Center of a black key trio
• Scale whose penultimate note is G
• It's a minor third above F
• Key of Chopin's "Polonaise-Fantaisie"
• Note above G
• Alias of G sharp
• Note two steps below C
• Key just above a G
• Major relative to F minor

Wiktionary Word definitions in Wiktionary
adv. (context obsolete English) level with the ground; flat.