gpu just means lots of cores. the cores are composed of execution units too.
even the most exotic architecure you can think of is imperative (systolic arrays, or transport triggered architecture or...whatever)
there are instructions and they are imperative.
I can vaguely rememeber some recent iterative AI of some kind who had to produce a functioning circuit to do XYZ, and the final netlist that it produced for the FPGA was so full of latches, taking advantage of weird timing skew in the FPGA fabric and stuff, and no engineer could understand the netlist as sensical, but the circuit worked... I suppose when there's that level of non-imperative design, you can truly call it both declarative, and magic.
even the most exotic architecure you can think of is imperative (systolic arrays, or transport triggered architecture or...whatever)
there are instructions and they are imperative.
I can vaguely rememeber some recent iterative AI of some kind who had to produce a functioning circuit to do XYZ, and the final netlist that it produced for the FPGA was so full of latches, taking advantage of weird timing skew in the FPGA fabric and stuff, and no engineer could understand the netlist as sensical, but the circuit worked... I suppose when there's that level of non-imperative design, you can truly call it both declarative, and magic.