Make integration gpu compatible

[edejong-caltech]

Purpose

Touches integrate_simpon_evenfast

To-do

Content

---

• [ ] I have read and checked the items on the review checklist.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.21%. Comparing base (29b59bb) to head (d816e5c). Report is 11 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #162 +/- ## ========================================== + Coverage 98.17% 98.21% +0.04% ========================================== Files 8 9 +1 Lines 493 505 +12 ========================================== + Hits 484 496 +12 Misses 9 9 ```

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