Compatibility summary
You will need a travel adapter in Guyana; plug types used there differ from Sweden.
Plug comparison
Sweden plug types: C F
Guyana plug types: A B
There is no common plug type between Sweden (C F) and Guyana (A B). You need a travel adapter.
Voltage comparison
Sweden: 230V, 50Hz
Guyana: 220V, 50Hz
Voltage difference is within a range many devices tolerate; check your appliance label.