Nothing of real note - have had to replace a few consumables (tyres, brake parts, and the oils and lubricants of course).
Non-start problem a few months ago was caused by poor-quality fuel from a local supermarket which will remain nameless, on fuelling up elsewhere the normal faultless service resumed.
For a mid-range supermini this car performs more than respectably, and the ride and handling are a cut above the class norm as you might expect from Peugeot.
This car is easier to maintain than later models being one of the last carb, non-cat, manual choke models.
If you have a touch of the boy/girl-racer about you, then try the XS model which has GTI-esque looks and an interior to match, but still with the 1360cc engine, albeit in a higher state of tune (90 bhp as opposed to the GR's 75).
Peugeot build quality is higher than some might have you believe.
Correction: the 205 XS has a maximum of 85 BHP but by their ages now, they'll be closer to 80 BHP. Thanks.
Also, depending on what engine you have in your GR the power either be 59 hp or 79 hp.