GZ is under cover so there should be no issues with openning this cache and signing the log if it's raining, there should be a nice dry seat for you to sit on too.
This can easily be done as a cache and dash but there is very limited room in this cache, so only small trackables (i.e. coins or tags on their own), or small swap items could really be left here.
Swag rules: please observe the unwritten-rule in the geocaching community that you only take a piece of swag if you put something of equal or better value/interest back into the cache ... this doesn't apply to trackable items as these are obviously free to move as per their specified goal.
This cache starts out with a random trolley token and a one penny piece squashed whilst in Cardiff so it has a suitable Welsh imprint on it's now elongated form.
Please remember to put the cache back exactly where you found it, thank you.
The area is pretty muggle free, albeit that it is a bus stop the busses only run a couple of times an hour, so unless someone is standing in the bus stop when you approach, you should be able to do this one without too much difficulty.