On paper Las Palmas is not strong opponent for Atletico Madrid to get points, which are ATM currently in 3rd in the standings for the awhile. Although also Las Palmas will play at home and their performance is not too bad so far, but Atletico Madrid should be able to achieve winning. Considering that Atletico Madrid points with Real Madrid in standings are not too far, In my opinion also Atletico Madrid will try their best to steal the three points. But maybe this match will end with a narrow score, and my guess with a goal difference of only 1 score 0-1 atau 1-2.
Las Palmas has won couple of matches against some average teams this season; they won away from home against Villarreal and Almeria and they won against Celta Vigo at home; this is given us a hindsight that they are not a bottom team as they are also struggling to see if they can qualify for either Europa Conference League or Europa League, therefore, they are not to be underrated even though Atletico Madrid is a strong team and have won them four times in their last fiver encounter.
Atletico Madrid on the other hand are looking for a way to go above Girona because if they win this match, they will have the same points with Girona but they will be ahead because of goal scored and goals conceded respectively, that is why they will try to win the match to give Barcelona more points gap.
Villarreal, Celta Vigo, Almeria. The performance of the three clubs defeated by Las Palmas this season is also not good, it cannot be compared with Atletico Madrid which is currently onfire collecting points. Currently ATM they are in 3rd position and Las Palmas are in 10th position, also based on head to head Atletico Madrid is ahead, so I think on paper ATM should be able to win. But I also don't underestimate Las Palmas, because that are not favorites team sometimes can make a surprises. Also, I guessed above that ATM would win with a narrow score difference, that's proof that I don't underestimate Las Palmas.
As you said and I also said above, ATM has a not too far gap so they will be motivated to get the full three points. Yes to have same points in standings with Girona and also Real Madrid, then ATM will make an their best effort to steal 3 points in that match against Las Palmas.