GEplot

If you know plot, try GEplot. GEplot uses the same syntax as plot, but draws over Google Earth maps.

Creates a file in kmz format that can be opened into Google Earth.
GEplot uses the same syntax as the traditional plot function but requires Latitude and Longitude (WGS84) instead of x and y.
Examples:
GEplot('my_track',Lat,Lon);
GEplot('my_track',Lat,Lon,'o-r','MarkerSize',10,'LineWidth',3)
Colors supported: blue, green, red, cyan, magenta, yellow, black, white.
Symbols supported: point, circle, x-mark, plus, star, square, diamond, filled square, filled diamond,filled circle.
Each plot appears as a separate folder within GE; within the folder line and marks are separated in two layer. Hence it is very easy to show/hide different plots.

If you need to convert from UTM to Lat/Lon you may use utm2deg.m, also available at Matlab Central.
If you want to add Labels and Descriptions to your point, use GEplotLabelsDesc.m, also available at Matlab Central