Yes, FINDING is a Scrabble word!

Letter values in Scrabble US: F 4, I 1, N 1, D 2, I 1, N 1, G 2.

Is it a valid word?

FINDING is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

the act of determining the properties of something, usually by research or calculation
the decision of a court on issues of fact or law
something that is found

come upon, as if by accident; meet with
discover or determine the existence, presence, or fact of
come upon after searching; find the location of something that was missed or lost
establish after a calculation, investigation, experiment, survey, or study
come to believe on the basis of emotion, intuitions, or indefinite grounds
perceive or be contemporaneous with
get something or somebody for a specific purpose
make a discovery, make a new finding
make a discovery
obtain through effort or management
decide on and make a declaration about
receive a specified treatment (abstract)
perceive oneself to be in a certain condition or place
get or find back; recover the use of
succeed in reaching; arrive at
accept and make use of one's personality, abilities, and situation

Also: find out, line up, get hold, come up, find oneself.