The context of 1 Corinthians 12 and 13 (spiritual gifts) appears to suggest that love (as well as hope and faith) is a spiritual gift:
31 But earnestly desire the higher gifts. And I will show you a still more excellent way. [1 Cor 12:31 ESV]
13 So now faith, hope, and love abide, these three; but the greatest of these is love. [1 Cor 13:13 ESV]
However, Galatians 5 presents love as a spiritual fruit:
22 But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, 23 gentleness, self-control; against such things there is no law. 24 And those who belong to Christ Jesus have crucified the flesh with its passions and desires. [Galatians 5:22-24 ESV]
Is love a spiritual gift or a spiritual fruit?