spell like abilities with greenbound summoning

[Crake]

Some spell-like abilities do have a minimum requirement, but they will state so specifically. Gnomes are the typical example, ones with at least 10 cha get a few extra SLAs, but there's definitely others, like half fiend/celestial, requiring at least 8 wisdom (so it's not even always a cha requirement) to gain their racial SLAs.

But yeah, unless it specifies that they must have a minimum, they can use it regardless of their ability scores.