Nothing is wrong with gate jump, you got killed while still in warp landing at the gate. This only works because the smart bomber knows where you land (coming from another gate). Make a ping bookmark above/behind the outgoing gate in warp distance (above 150km), and warp from there to the gate to jump. Plus fit enough tank to survive one smart bomb volley.
If you don’t have this ping yet, you can check for celestials nearby fulfilling your needs (coming to the gate in a different angle).